Improvement in molds for casting ribbed surfaces



s. BINGHAM.

'MOLDS FOR CASTING RIBBED SURFACES.

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-F'ETERS, FHOTO-LITHOGRAPHER, WASHINGTONv D Q UNITED SAMUEL H. BINGHAM,OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORTO THE BULLOCK PRINTING PRESSCOMPANY, OF SAME PLAOE.

IMPROVEMENT IN MOLDS FOR CASTING RlBBED SURFACES.

Specification forming art of Letters Patent N 0. 193,072, dated July 17,1877 application filed May 5, 1877.

To all whom it may concern.-

Be it known that I, SAMUEL H. BIN HAM of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented a new and usefulImprovement in Casting- Boxes, which improvement is fully set forth inthe following specification and accompanying drawings, forming part ofthe same, in which- Figure 1 is an elevation, and Fig. 2 a plan, of thecasting-box. Fig. 3 illustrates details, hereinafter described.

The object of this invention is to providea mold suitable for the rapidand convenient casting of forms in metalmore particularly softmetal-having ribbed or indented surfaces-"such, for instance, as thestereotypeplates used upon cylinder and other printingpresses.

The form of the mold or casting-box constituting this invention does notdifier from those in ordinary use; but the means of drawing or removingthe top or lid from the lowerbox or body of the mold have heretoforeonly consisted of the rude method of prying off the lid by handpinch-bars applied under one end of the lid until it could be rotatedupon an ordinary hinge at the other end, and thrown back far enough toremove the cast plate from its bed within the box. By this rude methodof removal not only is valuable time wasted, but the casting-box and lidare defaced and injured by the constant use of the pinch-bars; but theworst and most objectionable feature of the removal of the lidbypinch-bars is the injury inflicted upon the cast plate within the mold.

It can be readily seen that if the top or lid of the casting-box be soindented as to form ribs or other raised surfaces upon the cast plate,the lid must first be bodily withdrawn, in a right line, clear of suchribs before it can be rotated upon end; for if such rotation beattempted before the lid is clear of the ribs of the plate, shearing anddistortion of such ribs must occur, aggravated, of course, the greaterthe depth of the ribs and the length of the cast plate.

By the means employed in this invention for raising the lid of thecasting-box all the aboveanentioned objections are obviated, as

box is turned in a vertical plane upon trunnions, upon which it issuspended, in which position it remains until the metal hassufficientlycooled for the removal of the casting from the mold. O is a hingeuniting at their rear or lowerends the box B and lid A. Thesaid hinge isprovided with aneccentric axial pin, 01 f, and an elongated eye, 0. saidhinge is formed in two pieces, a 0, so that the eccentric-pin d f may beinserted within One jaw of the eye of the hinge. To the pin d f issecured the arm a which arm is connected, by the bent connecting-rod ato the arm b, which arm forms part of a boss secured to the shaft a, andprovided with another armor handlever, 70. The shaft on has two journalsin bearings secured to the lid A, as seen in the drawing, and isprovided with two eccentrics, ii, which serve to elevate the lid A whenthe said eccentrics are brought into contact with the top edges of thesides of the box B.

The operation of this mechanism can now be readily understood, and isas'follows: In Fig. 1, the light dotted lines indicate the respectivepositions of the lid and its operative mechanism when the lid is closed,when a cast-metal plate may be supposed tobe embedded between it and thebox proper. The heavy dotted lines indicate the respective positionsofthe lid and its operative mechanism when the lid has been elevated in aright, or virtually'right, plane, preparatory to its rotation upon thehinge G as a center, after which rotation the casting can be drawn outof the box clear of the lid. When the handlever k is in the positionshown in Fig. 2, the lid is closed; but by simply throwing the saidlever over into the position shown in dotted lines in Fig. l the lid israised bodily in a right plane clear of anyribs or ridges in the castplate within the box, when,

by using the lever k or any other attachments as handles, withoutrotating it in its bearings, the lid may be rotated by either the leverk or said attachments upon the hinge G. The movement in a right line ofthe lid A is effected at the rear end by the motion given to the arm afrom the handlever 7a through the connecting-rod a which, operating theeccentricpin df, causes it to raise one jaw of the hinge in dotted linesin Fig. 1, the'lid has been raised clear ofall ribs or elevations castupon the plate within the mold. The lid can then be rotated upon thehinge (J in the ordinary manner, carrying the whole operative mechanismwith it, whenever desired.

In can, of course, readily be seen that the I only office of theconnecting-rod a is to enable the lid to be raised by the movement ofone hand-lever.

If preferred, the connecting-rod may be dispen sed with, and the arms aand b be separately operated.

I do not herein claim, per 86, the eccentrichinge herein described, as Ireserve said hinge as the subject of a future application for other ILetters Patent.

Having thus fully described this improvement in casting-boxes, as of myinvention, I claim 1. A casting-box for the molding of indentedcastings, consisting of a lower box, in combination with a movable topor lid operated by an attached arm or arms, whereby the rear or lowerend of the lid is first raised in a right line, and then axiallyrotated, substantially as and for the purpose specified.

2. A casting-box for the molding of indented castings, consisting of alower box, in combination with a movable top or lid, operated by anattached arm or arms, whereby the upper or forward end of the lid isfirst raised in a right line, and then rotated upon the rear end,substantially as and for the purpose specified.

3. A casting-box for the molding of indented castings, consisting of alower box, in combination with a movable top or lid, operated byattached and connected arms or levers, whereby the entire lid is firstraised in a right line by a single hand-lever, and then rotated upon oneend, substantially as and for the purpose specified. Y

4. The combination, with a casting-box consisting of a lower box, B, anda top or lid, A, of an eccentric-shaft, a 6, attached thereto, wherebythe upper or forward end of the lid is raised in a right, or virtuallyright, line, as and for the purpose specified.

5. A casting-box consisting of a lower box,

B, and a top or lid, A, united thereto by a .slotted hinge, providedwith an eccentric-pin,

whereon the lower or rear end of the lid may be first raised in a right,or virtually right, line, and then rotated, substantially as and for thepurpose specified.

SAMUEL H. BINGHAM,

Witnesses ROBERT EGDELL, R. FARNHAM.

